CN105205382A - Two-dimension code identity authentication method and device - Google Patents
Two-dimension code identity authentication method and device Download PDFInfo
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- CN105205382A CN105205382A CN201410287381.6A CN201410287381A CN105205382A CN 105205382 A CN105205382 A CN 105205382A CN 201410287381 A CN201410287381 A CN 201410287381A CN 105205382 A CN105205382 A CN 105205382A
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Abstract
The invention discloses a two-dimension code identity authentication method and device. The method includes the steps that a two-dimension code in a PC is scanned through a mobile terminal; the mobile terminal acquires a wireless account number, a password and the IP address of the PC according to the two-dimension code; the mobile terminal opens a wireless network, the wireless account number and the password are added into a wireless list so that the mobile terminal can be in wireless connection with the PC, and the IP address of the PC is stored; the PC is connected to a big screen. Hence, by means of the two-dimension code identity authentication method and device, each teacher can use mobile terminal equipment for carrying out daily teaching work in a classroom.
Description
Technical field
The present invention relates to computer realm, refer to a kind of Quick Response Code auth method and device especially.
Background technology
Along with the develop rapidly of computer technology and the day by day universal of network application, more and more computer technology is applied to wherein in field of Education and teaching.Teacher is in daily teaching, and major part uses e-teaching plan, and the e-teaching plan of preparation is projected on education large-size screen monitors by PC by the teacher that teaches in classroom, shows student.But in existing teaching process, every the teacher that teaches can only carry out electronic instruction by PC fixing in classroom, makes teacher be subject to the restriction of fixing PC position when giving lessons.
Summary of the invention
In view of this, the object of the invention is to propose a kind of Quick Response Code auth method and device, every teacher can be made to use mobile terminal device to carry out daily teaching in classroom.
Based on above-mentioned purpose a kind of Quick Response Code auth method provided by the invention, comprise step:
By the Quick Response Code in mobile scanning terminal PC;
Described mobile terminal obtains the IP address of wireless account, password and PC according to this Quick Response Code;
Described mobile terminal opens wireless network, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC;
Described PC is connected to large-size screen monitors.
Alternatively, described Quick Response Code auth method logs in PC, judges whether the Quick Response Code that will scan in PC exists, can by the Quick Response Code in mobile scanning terminal PC if existed.
Further, described in log in PC and need user to input user's logon information, if log in failure, show inactive users, if log in successfully, under its this user can be checked, whether there is the Quick Response Code that will scan.
Further, described Quick Response Code auth method logs in PC, judges whether the Quick Response Code that will scan in PC exists, and if there is no then in PC, generates Quick Response Code;
In this PC, be provided with two-dimension code generator, first described two-dimension code generator obtains the dynamic IP addressing in this this moment of PC and account, the password of this PC wireless network, then generates described Quick Response Code.
Further; Quick Response Code after described generation carries out safe protection treatment; namely use false Quick Response Code to cover real Quick Response Code, or real Quick Response Code is placed in hidden file, or open the safeguard measure that real Quick Response Code needs to input password or password.
Further, described when generating Quick Response Code in PC, if this user generated Quick Response Code, the user that just this time logs in does not find or other reasons causes generated Quick Response Code again in PC, then can show invalid operation in described PC and exit.
Alternatively, described mobile terminal opens wireless network, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and after preserving the IP address of PC; Need to judge described mobile terminal whether can with PC wireless connections, if could; PC would be connected to large-size screen monitors, if could; would exit and show invalid Quick Response Code.
Further, described in exit and show invalid Quick Response Code be described mobile terminal can not with PC wireless connections, illustrate that the Quick Response Code that namely the wireless account of PC, the password bad that obtain scan is incorrect; The incorrect logon information being this user and logging in this PC in order to prevent others from stealing of Quick Response Code of scanning, get Quick Response Code and carry out illegal operation, this user is provided with a false Quick Response Code, and real Quick Response Code only has this user to know how to obtain and to scan.
Further, described PC is connected to large-size screen monitors by VGA or HDMI.
In addition, present invention also offers a kind of Quick Response Code authentication means, comprising:
Scanning element, for passing through the Quick Response Code in mobile scanning terminal PC;
Data capture unit, is connected with described scanning element, obtains the IP address of wireless account, password and PC for described mobile terminal according to this Quick Response Code;
Linkage unit, is connected with described data capture unit, opens wireless network for mobile terminal, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC; And described PC is connected to large-size screen monitors.
Alternatively, in described data capture unit, the IP address of PC is dynamic IP addressing, namely, when mobile terminal generates Quick Response Code in PC, be adopt to obtain the dynamic IP addressing of this PC and account, the password of this PC wireless network, then generate described Quick Response Code.
Further, described scanning element comprises log-in module, two-dimensional code generation module and Quick Response Code scan module; Wherein, described log-in module logs in PC, judges whether the Quick Response Code that will scan in PC exists, if exist, described log-in module is connected with described Quick Response Code scan module; If do not exist, described log-in module and described two-dimensional code generation module, then be connected with described Quick Response Code scan module;
Described two-dimensional code generation module is provided with two-dimension code generator in PC, and first described two-dimension code generator obtains the dynamic IP addressing in this this moment of PC and account, the password of this PC wireless network, then generates described Quick Response Code;
Described Quick Response Code scan module is by the Quick Response Code in described mobile scanning terminal PC;
Further, described log-in module logs in PC needs user to input user's logon information, user's logon information can be username and password, if log in failure, shows inactive users, if log in successfully, whether there is the Quick Response Code that will scan under can checking its this user.
Further; Quick Response Code after generation is carried out safe protection treatment by described two-dimensional code generation module; use false Quick Response Code to cover real Quick Response Code, or real Quick Response Code is placed in hidden file, or open the safeguard measure that real Quick Response Code needs to input password or password.
Further, if this user of described two-dimensional code generation module generated Quick Response Code, the user that just this time logs in does not find or other reasons causes generated Quick Response Code again in PC, then can show invalid operation in PC and exit.
Further, described linkage unit comprises mobile terminal and PC link block, judge module, is connected and exits module and PC and large-size screen monitors link block; Wherein, described mobile terminal is connected with PC link block and described judge module, described mobile terminal and PC link block open the wireless network of mobile terminal, described wireless account, password are joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC;
Described judge module judge described mobile terminal whether can with PC wireless connections, if could; would be connected with described large-size screen monitors link block, if could; would exit model calling with described connection; Described connection is exited module and is exited and show invalid Quick Response Code; Described large-size screen monitors link block can make PC be connected with large-size screen monitors.
Further, described connection is exited module and is exited and show invalid Quick Response Code, described mobile terminal can not with PC wireless connections, illustrate that the Quick Response Code that namely the wireless account of PC, the password bad that obtain scan is incorrect, then exit whole process and show invalid Quick Response Code;
The Quick Response Code of described scanning is incorrect is this user logs in this PC logon information in order to prevent others from stealing, get Quick Response Code and carry out illegal operation, this user is provided with a false Quick Response Code, and real Quick Response Code only has this user to know how to obtain and to scan; This user placed real Quick Response Code in a hidden file, or the real Quick Response Code of this user open the mode, the method that need password or password.
Further, described large-size screen monitors link block makes PC be connected with large-size screen monitors by VGA or HDMI.
As can be seen from above, Quick Response Code auth method provided by the invention and device, by the Quick Response Code in mobile scanning terminal PC; Described mobile terminal obtains the IP address of wireless account, password and PC according to this Quick Response Code; Described mobile terminal opens wireless network, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC; Described PC is connected to large-size screen monitors.Thus Quick Response Code auth method of the present invention and device can expand teacher's mobilizable scope in teaching process in classroom of teaching, and do not need to be copied to by the e-teaching plan of preparation in PC fixing in classroom again.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of embodiment of the present invention Quick Response Code auth method;
Fig. 2 is the schematic flow sheet of another specific embodiment Quick Response Code auth method of the present invention;
Fig. 3 is the structural representation of embodiment of the present invention Quick Response Code authentication means;
Fig. 4 is the structural representation of embodiment of the present invention scanning element;
Fig. 5 is the structural representation of embodiment of the present invention linkage unit.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Consult shown in Fig. 1, be the schematic flow sheet of embodiment of the present invention Quick Response Code auth method, described Quick Response Code auth method comprises step:
Step 101, by the Quick Response Code in mobile scanning terminal PC.
Step 102, described mobile terminal obtains the IP address of wireless account, password and PC according to this Quick Response Code.
Step 103, mobile terminal opens wireless network, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC.
Step 104, described PC is connected to large-size screen monitors.
As one embodiment of the present of invention, log in PC, judge whether the Quick Response Code that will scan in PC exists, can by the Quick Response Code in mobile scanning terminal PC if existed.Preferably, logging in PC needs user to input user's logon information, and user's logon information can be username and password, if log in failure, shows inactive users, if log in successfully, whether there is the Quick Response Code that will scan under can checking its this user.
Wherein, if judge there is not the Quick Response Code that will scan, in PC, Quick Response Code is generated.As an alternative embodiment of the invention, in PC, two-dimension code generator can be installed.First described two-dimension code generator obtains the dynamic IP addressing in this this moment of PC and account, the password of this PC wireless network, then generates described Quick Response Code.Preferably; Quick Response Code after generation can be carried out safe protection treatment by user; such as use false Quick Response Code to cover real Quick Response Code, or real Quick Response Code is placed in hidden file, or open the safeguard measure that real Quick Response Code needs to input password or password etc.Preferably, if this user generated Quick Response Code in this step, the user that just this time logs in does not find or other reasons causes generated Quick Response Code again in PC, then can show invalid operation in PC and exit.
In another embodiment of the present invention, the IP address of PC is dynamic IP addressing, namely, when mobile terminal generates Quick Response Code in PC, be adopt to obtain the dynamic IP addressing of this PC and account, the password of this PC wireless network, then generate described Quick Response Code.
Also it should be noted that, in another embodiment, described mobile terminal opens wireless network, and described wireless account, password are joined in wireless list and make described mobile terminal and PC wireless connections, if connection failure, the wireless account of the PC of acquisition is described, Quick Response Code that namely password bad scans is incorrect, then exit whole process and show invalid Quick Response Code.
Consult shown in Fig. 2, be the schematic flow sheet of another specific embodiment Quick Response Code auth method of the present invention, described Quick Response Code auth method comprises:
Step 201, logs in PC, judges whether the Quick Response Code that will scan in PC exists, if exist, carry out step 203, if do not exist, carry out step 202.
In one embodiment, logging in PC needs user to input user's logon information, and user's logon information can be username and password, if log in failure, shows inactive users, if log in successfully, whether there is the Quick Response Code that will scan under can checking its this user.
Step 202, generates Quick Response Code in PC, then carry out step 203.
As an alternative embodiment of the invention, in PC, two-dimension code generator can be installed.First described two-dimension code generator obtains the dynamic IP addressing in this this moment of PC and account, the password of this PC wireless network, then generates described Quick Response Code.
Preferably; Quick Response Code after generation can be carried out safe protection treatment by user; such as use false Quick Response Code to cover real Quick Response Code, or real Quick Response Code is placed in hidden file, or open the safeguard measure that real Quick Response Code needs to input password or password etc.
Preferably, if this user generated Quick Response Code in this step, the user that just this time logs in does not find or other reasons causes generated Quick Response Code again in PC, then can show invalid operation in PC and exit.
Step 203, by the Quick Response Code in mobile scanning terminal PC.
Step 204, described mobile terminal obtains the IP address of wireless account, password and PC according to this Quick Response Code.
In another embodiment of the present invention, the IP address of PC is dynamic IP addressing, namely, when mobile terminal generates Quick Response Code in PC, be adopt to obtain the dynamic IP addressing of this PC and account, the password of this PC wireless network, then generate described Quick Response Code.
Step 205, described mobile terminal opens wireless network, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC.
Step 206, judge described mobile terminal whether can with PC wireless connections, if could; carry out step 208, if could; carry out step 207.
Step 207, exits and shows invalid Quick Response Code.
In an embodiment, described mobile terminal can not with PC wireless connections, illustrate that the Quick Response Code that namely the wireless account of PC, the password bad that obtain scan is incorrect, then exit whole process and show invalid Quick Response Code.
It should be noted that, the incorrect logon information that may be this user and log in this PC in order to prevent others from stealing of Quick Response Code of scanning, get Quick Response Code and carry out illegal operation, this user is provided with a false Quick Response Code, and real Quick Response Code only has this user to know how to obtain and to scan.Such as this user placed real Quick Response Code in a hidden file, or the real Quick Response Code of this user open the mode, the method that need password or password etc.
Step 208, described PC is connected to large-size screen monitors.
In another embodiment, this PC can be connected with large-size screen monitors by VGA or HDMI.
Consult shown in Fig. 3, be the structural representation of embodiment of the present invention Quick Response Code authentication means, described Quick Response Code authentication means comprises:
Scanning element 301, for passing through the Quick Response Code in mobile scanning terminal PC.
Data capture unit 302, is connected with scanning element 301, obtains the IP address of wireless account, password and PC for described mobile terminal according to this Quick Response Code.
In another embodiment of the present invention, the IP address of PC is dynamic IP addressing, namely, when mobile terminal generates Quick Response Code in PC, be adopt to obtain the dynamic IP addressing of this PC and account, the password of this PC wireless network, then generate described Quick Response Code.
Linkage unit 303, is connected with data capture unit 302, opens wireless network for mobile terminal, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC.And described PC is connected to large-size screen monitors.
In one embodiment of the invention, as shown in Figure 4, scanning element 301 comprises log-in module 401, two-dimensional code generation module 402 and Quick Response Code scan module 403.Wherein, log-in module 401 can log in PC, and judge whether the Quick Response Code that will scan in PC exists, if exist, log-in module 401 is connected with Quick Response Code scan module 403; If do not exist, log-in module 401 and two-dimensional code generation module 402, then be connected with Quick Response Code scan module 403.Preferably, log-in module 401 logs in PC needs user to input user's logon information, user's logon information can be username and password, if log in failure, shows inactive users, if log in successfully, whether there is the Quick Response Code that will scan under can checking its this user.
Wherein, two-dimensional code generation module 402 can be provided with two-dimension code generator in PC.First described two-dimension code generator obtains the dynamic IP addressing in this this moment of PC and account, the password of this PC wireless network, then generates described Quick Response Code.Preferably; Quick Response Code after generation can be carried out safe protection treatment by user; such as use false Quick Response Code to cover real Quick Response Code, or real Quick Response Code is placed in hidden file, or open the safeguard measure that real Quick Response Code needs to input password or password etc.Preferably, if this user generated Quick Response Code, the user that just this time logs in does not find or other reasons causes generated Quick Response Code again in PC, then can show invalid operation in PC and exit.
Wherein, Quick Response Code scan module 403 is by the Quick Response Code in mobile scanning terminal PC.
As an alternative embodiment of the invention, as shown in Figure 5, linkage unit 303 comprises mobile terminal and PC link block 501, judge module 502, is connected and exits module 503 and PC and large-size screen monitors link block 504.Wherein, mobile terminal is connected with PC link block 501 and judge module 502, mobile terminal and PC link block 501 open the wireless network of mobile terminal, described wireless account, password are joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC.
Wherein, judge module 502 judge described mobile terminal whether can with PC wireless connections, if could; large-size screen monitors link block 504 would connect, if could; would exit module 503 and connect with being connected.Connect and exit module 503 and exit and show invalid Quick Response Code, described mobile terminal can not with PC wireless connections, the wireless account of PC of acquisition is described, Quick Response Code that namely password bad scans is incorrect, then exit whole process and show invalid Quick Response Code.It should be noted that, the incorrect logon information that may be this user and log in this PC in order to prevent others from stealing of Quick Response Code of scanning, get Quick Response Code and carry out illegal operation, this user is provided with a false Quick Response Code, and real Quick Response Code only has this user to know how to obtain and to scan.Such as this user placed real Quick Response Code in a hidden file, or the real Quick Response Code of this user open the mode, the method that need password or password etc.Large-size screen monitors link block 504 can make PC be connected with large-size screen monitors by VGA or HDMI.
In sum, Quick Response Code auth method provided by the invention and device, creatively propose by the Quick Response Code in mobile scanning terminal PC, obtain the IP address of wireless account, password and PC, mobile terminal opens wireless network and PC wireless connections, and described PC is connected to large-size screen monitors; Described Quick Response Code auth method can be Prometheanly connected with this PC by mobile terminal with device on the basis that PC can be connected with large-size screen monitors, thus makes operation on mobile terminal can be embodied on described large-size screen monitors; And the present invention makes each mobile terminal have security, uniquely be logged on large-size screen monitors by PC and operate by Quick Response Code Authentication mechanism; Meanwhile, the Quick Response Code Authentication mechanism that described Quick Response Code auth method and device adopt is in order to strengthen its preciseness, security, the generation of its Quick Response Code is the dynamic IP addressing by PC, prevent and cause the Quick Response Code generated to be stolen because of easily obtaining fixed ip address, dynamic IP address only obtains when mobile terminal generates this Quick Response Code, because it changes so the Quick Response Code generated by this dynamic IP addressing has uniqueness at any time; What deserves to be explained is, the present invention just sets an analysis when logging in PC scanning Quick Response Code, an analysis is provided with time Quick Response Code is set, be provided with again an analysis when using below the information in Quick Response Code that this mobile terminal is connected with PC, accomplish multiple protective for the user; Finally, whole described Quick Response Code auth method and device easy, compact, be easy to realize.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. a Quick Response Code auth method, is characterized in that, comprises step:
By the Quick Response Code in mobile scanning terminal PC;
Described mobile terminal obtains the IP address of wireless account, password and PC according to this Quick Response Code;
Described mobile terminal opens wireless network, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC;
Described PC is connected to large-size screen monitors.
2. method according to claim 1, is characterized in that, described Quick Response Code auth method logs in PC, judges whether the Quick Response Code that will scan in PC exists, can by the Quick Response Code in mobile scanning terminal PC if existed.
3. method according to claim 2, is characterized in that, described in log in PC and need user to input user's logon information, if log in failure, show inactive users, if log in successfully, under its this user can be checked, whether there is the Quick Response Code that will scan.
4. method according to claim 2, is characterized in that, described Quick Response Code auth method logs in PC, judges whether the Quick Response Code that will scan in PC exists, and if there is no then in PC, generates Quick Response Code;
In this PC, be provided with two-dimension code generator, first described two-dimension code generator obtains the dynamic IP addressing in this this moment of PC and account, the password of this PC wireless network, then generates described Quick Response Code.
5. method according to claim 4; it is characterized in that; Quick Response Code after described generation carries out safe protection treatment; namely false Quick Response Code is used to cover real Quick Response Code; or real Quick Response Code is placed in hidden file, or opens the safeguard measure that real Quick Response Code needs to input password or password.
6. method according to claim 4, it is characterized in that, described when generating Quick Response Code in PC, if this user generated Quick Response Code, the user that just this time logs in does not find or other reasons causes generates Quick Response Code again in PC, then can show invalid operation in described PC and exit.
7. method according to claim 1, is characterized in that, described mobile terminal opens wireless network, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and after preserving the IP address of PC; Need to judge described mobile terminal whether can with PC wireless connections, if could; PC would be connected to large-size screen monitors, if could; would exit and show invalid Quick Response Code.
8. method according to claim 7, is characterized in that, described in exit and show invalid Quick Response Code be described mobile terminal can not with PC wireless connections, illustrate that the Quick Response Code that namely the wireless account of PC, the password bad that obtain scan is incorrect; The incorrect logon information being this user and logging in this PC in order to prevent others from stealing of Quick Response Code of scanning, get Quick Response Code and carry out illegal operation, this user is provided with a false Quick Response Code, and real Quick Response Code only has this user to know how to obtain and to scan.
9. method according to claim 7, is characterized in that, described PC is connected to large-size screen monitors by VGA or HDMI.
10. a Quick Response Code authentication means, is characterized in that, comprising:
Scanning element, for passing through the Quick Response Code in mobile scanning terminal PC;
Data capture unit, is connected with described scanning element, obtains the IP address of wireless account, password and PC for described mobile terminal according to this Quick Response Code;
Linkage unit, is connected with described data capture unit, opens wireless network for mobile terminal, and described wireless account, password is joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC; And described PC is connected to large-size screen monitors.
11. devices according to claim 10, it is characterized in that, in described data capture unit, the IP address of PC is dynamic IP addressing, namely when mobile terminal generates Quick Response Code in PC, be adopt to obtain the dynamic IP addressing of this PC and account, the password of this PC wireless network, then generate described Quick Response Code.
12. devices according to claim 11, is characterized in that, described scanning element comprises log-in module, two-dimensional code generation module and Quick Response Code scan module; Wherein, described log-in module logs in PC, judges whether the Quick Response Code that will scan in PC exists, if exist, described log-in module is connected with described Quick Response Code scan module; If do not exist, described log-in module and described two-dimensional code generation module, then be connected with described Quick Response Code scan module;
Described two-dimensional code generation module is provided with two-dimension code generator in PC, and first described two-dimension code generator obtains the dynamic IP addressing in this this moment of PC and account, the password of this PC wireless network, then generates described Quick Response Code;
Described Quick Response Code scan module is by the Quick Response Code in described mobile scanning terminal PC.
13. devices according to claim 12, it is characterized in that, described log-in module logs in PC needs user to input user's logon information, user's logon information can be username and password, if log in failure, show inactive users, if log in successfully, under its this user can be checked, whether there is the Quick Response Code that will scan.
14. devices according to claim 12; it is characterized in that; Quick Response Code after generation is carried out safe protection treatment by described two-dimensional code generation module; false Quick Response Code is used to cover real Quick Response Code; or real Quick Response Code is placed in hidden file, or opens the safeguard measure that real Quick Response Code needs to input password or password.
15. devices according to claim 14, it is characterized in that, if this user of described two-dimensional code generation module generated Quick Response Code, the user that just this time logs in does not find or other reasons causes generates Quick Response Code again in PC, then can show invalid operation in PC and exit.
16. devices according to claim 11, is characterized in that, described linkage unit comprises mobile terminal and PC link block, judge module, be connected and exit module and PC and large-size screen monitors link block; Wherein, described mobile terminal is connected with PC link block and described judge module, described mobile terminal and PC link block open the wireless network of mobile terminal, described wireless account, password are joined in wireless list and make described mobile terminal and PC wireless connections, and preserve the IP address of PC;
Described judge module judge described mobile terminal whether can with PC wireless connections, if could; would be connected with described large-size screen monitors link block, if could; would exit model calling with described connection; Described connection is exited module and is exited and show invalid Quick Response Code; Described large-size screen monitors link block can make PC be connected with large-size screen monitors.
17. devices according to claim 16, it is characterized in that, described connection is exited module and is exited and show invalid Quick Response Code, described mobile terminal can not with PC wireless connections, illustrate that the Quick Response Code that namely the wireless account of PC, the password bad that obtain scan is incorrect, then exit whole process and show invalid Quick Response Code;
The Quick Response Code of described scanning is incorrect is this user logs in this PC logon information in order to prevent others from stealing, get Quick Response Code and carry out illegal operation, this user is provided with a false Quick Response Code, and real Quick Response Code only has this user to know how to obtain and to scan; This user placed real Quick Response Code in a hidden file, or the real Quick Response Code of this user open the mode, the method that need password or password.
18. devices according to claim 16, is characterized in that, described large-size screen monitors link block makes PC be connected with large-size screen monitors by VGA or HDMI.
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| CN201410287381.6A CN105205382A (en) | 2014-06-24 | 2014-06-24 | Two-dimension code identity authentication method and device |
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